LBZ-“Water in Fuel” message - Chevy and GMC Duramax Diesel Forum
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post #1 of 14 (permalink) Old 07-10-2019, 03:42 PM Thread Starter
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LBZ-“Water in Fuel” message

On the way to work, I got a random “water in fuel” message pop up on the message center on my 2006 LBZ. On my lunch break, I decided to go out and open up the drain valve for the water/fuel separator, and drained about 24 ounces out of it. There was no water, just clean diesel. I started my truck afterwards to make sure there was no leaks, and the message came up again. I keep up with fuel filter changes every 10k, with genuine AC Delco fuel filters, so would this be a bad sensor? Or are these things just not very accurate? Thanks in advance.

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post #2 of 14 (permalink) Old 07-10-2019, 03:48 PM
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Check the connector and wiring for your water sensor. he intermittent nature of your problems suggests wiring problem. If nothing found, you might try a new sensor.

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post #3 of 14 (permalink) Old 07-10-2019, 03:56 PM Thread Starter
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Originally Posted by Ron Nielson View Post
Check the connector and wiring for your water sensor. he intermittent nature of your problems suggests wiring problem. If nothing found, you might try a new sensor.
Yeah I checked the connection and the short bit of wiring and all seemed to be in tact.

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post #4 of 14 (permalink) Old 07-10-2019, 09:45 PM
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It's most likely an issue with the sensor like stated above. They arent the greatest to begin with. Get a wif sensor delete plug from merchant.

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post #5 of 14 (permalink) Old 07-11-2019, 03:35 AM Thread Starter
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It's most likely an issue with the sensor like stated above. They arent the greatest to begin with. Get a wif sensor delete plug from merchant.
I did look into that, will the filter still filter out water from fuel? I guess I’m confused on how that would be beneficial 🙂

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post #6 of 14 (permalink) Old 07-11-2019, 08:37 AM
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Yes it doesnt affect the filtering capabilities what so ever. Just gets rid of that problematic sensor. They get brittle and break, so do the wires.

My name is Nic
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Various parts from SDP, WCFAB, LDS, DHD,
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post #7 of 14 (permalink) Old 07-11-2019, 10:52 AM Thread Starter
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Yes it doesnt affect the filtering capabilities what so ever. Just gets rid of that problematic sensor. They get brittle and break, so do the wires.
Ok great! Thanks for your help!
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post #8 of 14 (permalink) Old 07-11-2019, 12:15 PM
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You're welcome

My name is Nic
2011 GMC Sierra 2500 CCSB LML,
Lil ole single s400, fuel,
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Various parts from SDP, WCFAB, LDS, DHD,
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post #9 of 14 (permalink) Old 07-12-2019, 09:27 AM
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Sensors aren't the best but they're better than no sensor, I would replace it with a new one they don't cost that much and at least if you get a bad batch of fuel in will warn you believe me it happens.

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post #10 of 14 (permalink) Old 07-12-2019, 01:07 PM
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Those sensors are hit or miss imo. I've drained quite a bit of water out of filters before and it didnt have the light on. Then had some that through the light with no water in them at all. If you have a lift pump I wouldnt worry about it.

My name is Nic
2011 GMC Sierra 2500 CCSB LML,
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supporting mods,
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Various parts from SDP, WCFAB, LDS, DHD,
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